Sugar Ray Robinson - 173-19-6 (108 KOs) Averaging 8 fights a year.
Win % 86.5
KO % 62.4
Notable wins: Jake LaMotta, Henry Armstrong, Artie Levine, Georgie Abrams, Jimmie Doyle, Chuck Taylor,
Kid Gavilan, Luc Van Dam, Randy Turpin, Ralph Dupas.
Tites: National Boxing Association World Middleweight Title, World Middleweight Title, Pennsylvania State World Middleweight Title, World Welterweight Title

Muhammed Ali - 56-5-0 (37 KOs) Averaging 3 fights a year.
Win % 91.8
KO % 66.1
Notable wins: Archie Moore, Sonny Liston, Floyd Patterson, George Chuvalo, Ken norton, Joe Frazier, George Foreman.
Titles: World Heavyweight Title, WBA Heavyweight Title, NABF Heavyweight Title, WBA Heavyweight Title

Hope this helps.